"coal pusher" meaning in English

{
  "forms": [
    {
      "form": "coal pushers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "coal pusher (plural coal pushers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "English entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Coal",
          "orig": "en:Coal",
          "parents": [
            "Fossil fuels",
            "Carbon",
            "Energy",
            "Natural resources",
            "Carbon group elements",
            "Nature",
            "Matter",
            "Chemical elements",
            "All topics",
            "Chemistry",
            "Fundamental",
            "Sciences"
          ],
          "source": "w"
        },
        {
          "kind": "topical",
          "langcode": "en",
          "name": "Rail transportation",
          "orig": "en:Rail transportation",
          "parents": [
            "Transport",
            "All topics",
            "Fundamental"
          ],
          "source": "w"
        }
      ],
      "examples": [
        {
          "ref": "1959, David P. Morgan, editor, Steam's Finest Hour, Kalmbach Publishing Co., page 71",
          "text": "The M-1's had roller bearings on all axles, high-speed Franklin boosters, steam lines, tender coal pushers - all the gadgets one could ask.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "a device used to push coal forward in the tender of a steam locomotive."
      ],
      "id": "en-coal_pusher-en-noun-mFSA2n0E",
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "push",
          "push"
        ],
        [
          "forward",
          "forward"
        ],
        [
          "tender",
          "tender"
        ],
        [
          "steam locomotive",
          "steam locomotive"
        ]
      ],
      "raw_glosses": [
        "(rail transport) a device used to push coal forward in the tender of a steam locomotive."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "coal pusher"
}

{
  "forms": [
    {
      "form": "coal pushers",
      "tags": [
        "plural"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {},
      "expansion": "coal pusher (plural coal pushers)",
      "name": "en-noun"
    }
  ],
  "lang": "English",
  "lang_code": "en",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "English countable nouns",
        "English entries with incorrect language header",
        "English lemmas",
        "English multiword terms",
        "English nouns",
        "English terms with quotations",
        "en:Coal",
        "en:Rail transportation"
      ],
      "examples": [
        {
          "ref": "1959, David P. Morgan, editor, Steam's Finest Hour, Kalmbach Publishing Co., page 71",
          "text": "The M-1's had roller bearings on all axles, high-speed Franklin boosters, steam lines, tender coal pushers - all the gadgets one could ask.",
          "type": "quotation"
        }
      ],
      "glosses": [
        "a device used to push coal forward in the tender of a steam locomotive."
      ],
      "links": [
        [
          "rail transport",
          "rail transport"
        ],
        [
          "push",
          "push"
        ],
        [
          "forward",
          "forward"
        ],
        [
          "tender",
          "tender"
        ],
        [
          "steam locomotive",
          "steam locomotive"
        ]
      ],
      "raw_glosses": [
        "(rail transport) a device used to push coal forward in the tender of a steam locomotive."
      ],
      "topics": [
        "rail-transport",
        "railways",
        "transport"
      ]
    }
  ],
  "word": "coal pusher"
}